
class MyRunnable implements Runnable{
    @Override
    public void run(){
        while(true){
            System.out.println("hello thread");
            try{
                Thread.sleep(1000);
            }catch (InterruptedException e){
                throw new RuntimeException(e);
            }
        }
    }
}

public class Demo2 {
    public static void main(String[] args) {
        Runnable runnable=new MyRunnable();
        Thread t=new Thread(runnable);
        t.start();
        while(true  ){
            System.out.println("hello main");
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}
